IWDG initialization Error.

[Rghar.1]

In my project there is requirement to initialize the IWDG for two times one with time period 5 second in run-mode and re-configuring it for 32 second before controller enters into sleep mode. as shown in below code.

hiwdg.Instance = IWDG;

hiwdg.Init.Prescaler = IWDG_PRESCALER_64;

hiwdg.Init.Window = 4095;

hiwdg.Init.Reload = 2560;

if (HAL_IWDG_Init(&hiwdg) != HAL_OK) {

Error_Handler();

}

{

//Blocks Of statements

}

hiwdg.Instance = IWDG;

hiwdg.Init.Prescaler = IWDG_PRESCALER_256;

hiwdg.Init.Window = 4095;

hiwdg.Init.Reload = 4095;

if (HAL_IWDG_Init(&hiwdg) != HAL_OK) {

Error_Handler();

}

HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON,PWR_SLEEPENTRY_WFI);

But getting issues in second initialization. second initialization is getting failed.

Using STM32l4r5 controller.

someone please help me out in this issue. thanking in advance.

[waclawek.jan]

What exactly means "second initialization is getting failed", what are the symptoms?

JW

[TDK]

That code runs fine for me on an H7 chip. Don't have an L4 to try.